초록 |
An acridine based high triplet energy hole transport material, 1,3-bis(9,9-dimethylacridin-10(9H)-yl)benzene (mAP), was synthesized for increased efficiency and lifetime. The mAP hole transport material was measured to have high triplet energy of 3.04 eV and good hole transport properties by the acridine moiety. The invention of mAP as the hole transport layer in blue phosphorescent organic light-emitting diodes showed a twofold quantum efficiency and kept the lifetime of the reference device. |